Back to All Scenarios
PASSEDcache / shutdown_failure
Memcached 1.6 Failed Graceful Shutdown — Killed with SIGKILL on RHEL 9
Memcached 1.6 did not shut down within the timeout period and was force-killed with SIGKILL. Data corruption possible.
Pattern
PROCESS_CRASH_LOOP
Severity
HIGH
Confidence
72%
Remediation
Auto-Heal
Test Results
| Metric | Expected | Actual | Result |
|---|---|---|---|
| Pattern Recognition | PROCESS_CRASH_LOOP | PROCESS_CRASH_LOOP | |
| Severity Assessment | HIGH | HIGH | |
| Incident Correlation | N/A | None | |
| Cascade Escalation | N/A | No | |
| Remediation | — | Auto-Heal — Corax resolves autonomously |
Scenario Conditions
RHEL 9. Memcached 1.6 sent SIGTERM for graceful shutdown. Did not exit within 30s. Killed with SIGKILL. In-flight transactions may be lost.
Injected Error Messages (1)
Memcached 1.6 sigkill on RHEL 9 — graceful shutdown timeout, process killed with SIGKILL after 30s, memcached crash loop during restart, core dump possible, in-flight data may be corrupted
Neural Engine Root Cause Analysis
Process crash loop detected — a service is repeatedly crashing and restarting, failing to reach a stable running state. This indicates a persistent issue such as a missing dependency, corrupted configuration, incompatible library version, memory corruption, or an unhandled exception that occurs during startup. In Kubernetes environments, this manifests as CrashLoopBackOff with exponentially increasing restart delays.
Remediation Plan
1. Check service logs immediately before each crash for the error message or stack trace.
2. Look for core dumps in /var/crash/ or the configured core dump location.
3. Verify all dependencies (config files, environment variables, database connectivity) are available.
4. Roll back to the last known working version if the crash started after a deployment.
5. For segfaults, check for library version mismatches or corrupted binaries — reinstall the package.
Tested: 2026-04-02Monitors: 1 | Incidents: 1Test ID: cmnhnwq3y067dlijgxcrn8wik